ASTM D4807 Standard Test Method for Sediment in Crude Oil by Membrane Filtration
3. Summary of Test Method
3.1 A portion of a representative crude oil sample is dissolved in hot toluene and filtered under vacuum through a 0.45-µm porosity membrane filter. The filter with residue is washed, dried, and weighed to give the final result.
4. Significance and Use
4.1 A knowledge of the sediment content of crude oil is important both in the operation of the refinery and in the buying and selling of crude oils.
